JPH0420436A - Paper feeding device for image recording apparatus - Google Patents

Abstract

PURPOSE:To feed paper one sheet at a time with certainty without removing the developer on a developer sheet by separating a developer sheet using a separating plate of a sheet cassette as well as by absorbing the developer sheet with a sucking disc installed on an absorption retentive member. CONSTITUTION:A sucking disc 55 is made to come in contact with a developer sheet 48 at the uppermost while turning an absorption retentive member 54 by oscillating an oscillating arm 53. After absorbing the developer sheet 48 to the sucking disc 55 under this condition, the absorption retentive member 54 is turned by oscillating the oscillating arm 53 upward and one end of the developer sheet 48 is made to come in contact with a separating plate 52 of a sheet cassette 51. Thus the developer sheet is removed with certainty and the required paper feeding is carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a paper feeding mechanism of an image recording device, and is used for image recording for supplying a color developer sheet that is superimposed on a photosensitive recording medium and developed under pressure. It relates to the paper feeding mechanism of the device.

[Conventional technology]

Conventionally, a color image recording device has been developed that has a monochrome laser printer connected to the upper part of the device. being done.

Inside such a color image recording device, there is a positioning device that arranges the mask original conveyed from the monochrome laser printer, and near this positioning device, there are red, green, and blue filters. An exposure device having an exposure device is disposed along the alignment device so as to be able to scan freely.

Furthermore, a photosensitive recording medium that is brought into close contact with the lower surface of the belt through the mask original during exposure is continuously arranged on the lower surface side of the alignment device, and on the downstream side of the alignment device, a photosensitive recording medium is continuously arranged. , a pressure developing device is provided which superimposes and develops the exposed photosensitive recording medium and the color developer sheet.

The color developer sheet is stored inside a sheet cassette, and a separation feed roller made of a half-moon-shaped rubber material or the like disposed near the sheet cassette separates the color developer sheet into one sheet. They are separated and taken out one by one and transported to the pressure developing device.

In the color image recording apparatus, red (R) is imported from the monochrome laser.

Green (G) and blue (B) mask masters are sequentially conveyed to the alignment device, and with the photosensitive recording medium in close contact with the mask master, the exposure device scans the photosensitive recording medium. The image of the mask original plate is transferred to. Then, by performing this operation on each color mask original using red, green, and blue filters, a latent image is formed on the photosensitive recording medium. Thereafter, the photosensitive recording medium is conveyed to the pressure developing device, which heats the photosensitive recording medium and the developer sheet taken out from the sheet cassette by the separation feed roller in a superposed state. Then, a color image is formed on the developer sheet.

However, in the developer sheet feeding means described above, when separating the uppermost developer sheet of the stacked developer sheets, the separating paper feed roller, the developer sheet, and each developer are separated. Because it utilizes the difference in the coefficient of friction between the colorant sheet and the
When the separation feed roller and the back side of the developer sheet come into contact, the front side of the first developer sheet and the back side of the second developer sheet rub, causing the first developer sheet to A portion of the color developer of the colorant sheet is peeled off, and the pressure development device cannot properly perform pressure development in the portion where the color developer has been peeled off, resulting in a significant deterioration in image quality. In addition, if the separation feed roller and the developer surface of the developer sheet come into contact, slipping will occur between the roller and the developer surface during separation, and the developer will similarly peel off. There is a problem in that the image quality deteriorates.

Therefore, as disclosed in Japanese Patent Application Laid-Open No. 55-93744, a mechanism has been used in which paper is fed by sucking the developer sheet using a suction cup that utilizes negative pressure. . This paper feeding mechanism separates each developer sheet by blowing air into the gap between each developer sheet, and also raises and lowers the plywood of the sheet cassette according to the amount of developer sheets consumed. However, the uppermost color developer sheet is sucked by the suction cup to feed the paper.

[Problem to be solved by the invention]

However, in the paper feeding mechanism of the conventional image recording apparatus, although it is possible to prevent the developer from peeling off due to friction between the developer sheets, it is necessary to separate the developer sheets from each other. In addition, since the plywood of the sheet cassette is raised and lowered, the mechanism is large and the structure is extremely complex, making it difficult to manufacture and significantly increasing manufacturing costs. The problem is that the

The present invention has been made in view of the above-mentioned points, and can be easily and inexpensively manufactured with a simple structure, and can properly sort the developer without peeling off the developer from the developer sheet. The object of the present invention is to provide a paper feeding mechanism for an image recording apparatus that is capable of feeding paper.

[Means to solve the problem]

In order to achieve the above object, the paper feeding mechanism of the image recording apparatus according to the present invention is arranged such that the paper feed mechanism is stacked and stored inside a sheet cassette, superimposed on a photosensitive recording medium on which a latent image has been formed by a mask original, and pressurized by a pressure developing device. The color developer sort to be developed is 1
In a sheet feeding mechanism of an image recording apparatus for feeding sheets one by one, when a swinging arm is disposed near the sheet cassette, the swinging operation of the swinging arm causes the A suction holding member that moves up and down and rotates with respect to the color developer sheet is attached, a suction cup for sucking the color developer sheet is disposed on this suction and holding member, and a peeling plate is provided on the inner surface of the paper feeding side of the sheet cassette. is fixed.

[Effect]

According to the present invention, by swinging the swing arm,
While the suction holding member is rotated, the suction cup is brought into contact with the uppermost color developer sheet, and in this state, after the suction cup adsorbs the color developer sheet, the swinging arm is swung upward to adsorb it. By rotating the holding member, the leading end of the developer sheet comes into contact with the peeling plate of the sheet cassette, thereby reliably separating the developer sheet and feeding the sheet as specified. It is. As a result, it is possible to reliably feed one sheet at a time without peeling off the color developer from the color developer sheet.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2.

FIG. 1 shows an embodiment of a color image recording device in which a monochrome laser printer is connected to the upper part.
A polygon scanner 3 is disposed above the photoreceptor 2, which irradiates the outer peripheral surface of the photoreceptor 2 with a laser beam to draw an electrostatic latent image. Further, the photoreceptor 2
A developing device 4 is disposed on the outer periphery of the photoconductor 2, and the developer 4 makes the electrostatic latent image visible by applying toner to the electrostatic latent image. A transfer device 5 is provided to transfer the toner image onto paper.

A paper feed cassette 6 storing paper such as plain paper or 0F (P sheet) is removably disposed upstream of the monochrome laser printer 1.
A paper feed roller 7 is disposed near the paper feed roller 7 for conveying the paper sheets in the paper feed cassette 6 one by one between the photoreceptor 2 and the transfer device 5.

Further, a fixing device 8 is disposed downstream of the photoreceptor 2 of the monochrome laser printer 1, and a conveyance roller 9 and a paper path switching device 10 are disposed downstream of the fixing device 8. ing. Further, a monochrome paper ejection tray 11 is disposed above the monochrome laser printer 1, and an automatic document feeder t (AD) is provided downstream of the monochrome laser printer 1 via a receiving roller 12.
F) A tray 13 is provided.

Then, the paper conveyed from the fixing device 8 is discharged by the paper path switching device 10 to the monochrome paper output tray 11 if a black and white image is required, and to the ADF if a color image is required. It is discharged onto the tray 13.

Further, the ADF h-ray 13 guides the paper ejected from the monochrome laser printer 1 downward and carries it into the color image recording device 14. A set of three sheets of monochrome printed paper is used as a mask original plate 15 (15R, 15G) for the color image recording device 14.
, 15B).

Note that the monochrome laser printer 1 normally records image data transmitted from a host computer (not shown).

Next, the configuration of the color image recording device 14 will be explained.

A positioning device 16 is disposed inside and below the color image recording device 14, and this positioning device 16 includes a glass plate 17 and feed rollers 18 and 19 disposed at both ends of the glass plate 17. have. In addition, the AD
A mask original transport path 20 is formed between the F tray 13 and the alignment device 16, and above this mask original transport path 20, the mask original 15 of the ADFh ray 13 is transported. Feed roller 2 to feed to the path 20
1 and a recurler roller 22 for removing curls from the mask original 15 are provided, respectively.

Further, a mask original storage section 23 is provided on one side of the mask original transport path 20 in parallel with the mask original transport path 20, and near the mask original transport side of the alignment device 16, A gate 24 is provided to switch between the mask original transport path 20 and the mask original storage section 23. Further, a mask original discharge tray 25 for discharging unnecessary mask originals 15 is disposed on the mask original discharge side of the alignment device 16, and above this mask original discharge tray 25, A mask original retraction section 26 is formed. Near the mask original discharge side of the alignment device 16, the mask original discharge tray 25 and the mask original retraction section 2 are provided.
A gate 24 is provided between the alignment device 16 and each gate 24, 27, and between the mask original transport path 20, the mask original storage section 23, the mask original discharge tray 25, and the mask original paper storage section 23. The original retracting section 26 includes a pair of transport rollers 28 and 2 for transporting the mask original 15.
9, 30, 31, 32, and 33 are respectively arranged so as to be freely rotatable in forward and reverse directions.

Further, the mask original discharge tray 2 of the alignment device 16
An exposure device 34 extending in the width direction of the alignment device 16 is disposed below the alignment device 16 so as to be able to reciprocate along the alignment device 16. A reflector plate 36 for reflecting the light emitted from the lamp 35 is disposed below the lamp 35.
5 and the reflective plate 36, a filter unit 37 is disposed on the upper surface side of the reflector plate 36, and is formed by switchably forming a red filter 37R, a green filter 37G, and a blue filter 37B.

Further, a flat plate-shaped exposure table 38 is disposed near the top of the alignment device 16, and a drive device (not shown) drives the exposure table 38 on the lower surface thereof to move the exposure table 38 up and down. A cam 39 is provided for causing the rotation. Furthermore, a fixed roller 40 is disposed at the left end of the exposure table 38 in the drawing.

Further, a cartridge 42 is disposed above the upstream side of the alignment device 16 to accommodate a roll-shaped photosensitive recording medium 41 therein so as not to be exposed to light.The photosensitive recording medium 41 is provided with pack tension. supplied roll 4
It is wound around 3.

The photosensitive recording medium 41 is, for example, disclosed in Japanese Patent Application Laid-Open No. 621430.
The main material is a photocurable resin using a photopolymerization initiator disclosed in Publication No. 44, and the photocurable resin cures when exposed to light of each wavelength of red, green, and blue, and each of cyan, magenta, and yellow. Microcapsules containing a dye precursor are coated onto a base sheet. This photosensitive recording medium 41 is guided to the lower surface side of the exposure table 38, and is transported a predetermined length in one direction as the three mask originals 15R, 15G, and 15B are transported.

Then, the photosensitive recording medium 41 is moved onto the mask original 15 transported onto the glass plate 17 of the alignment device 16 by lowering the exposure table 38 using the cam 39.
and the photosensitive recording medium 41 are brought into close contact with each other. The recording medium 41 is placed on the exposure table 38
It is designed to be fixed to

Further, above the exposure table 38, a pair of pressure rollers 4 are provided.
A pressure developing device 45 having built-in components 4 and 44 is disposed between the exposure table 38 and the pressure developing device 45. A buffer roller 46 for preventing sagging is disposed so as to be movable in the left-right direction.

Further, a winding roller 47 for winding up the photosensitive recording medium 41 is disposed above the pressure developing device 45, and between the pressure developing device 45 and the winding roller 47, the photosensitive recording medium 41 is wound up. A developer sheet separation roller 49 that separates the recording medium 41 and the developer sheet 48 and a drive roller 50 that conveys the photosensitive recording medium 41 at a constant speed are provided. The photosensitive recording medium 41 in the cartridge 42 passes between the glass plate 17 of the alignment device 16 and the exposure table 38, and then passes through the buffer roller 46, the pressure developing device 45, and the developer sheet separation roller 49. The photosensitive recording medium 41 passes through a drive roller 50 and a winding roller 47, respectively, and is wound onto a winding roller 47.
Each latent image is conveyed at a constant pitch, and the photosensitive recording medium 41 is stopped when the leading end of the latent image is conveyed to the pressure roller 44 of the pressure developing device 45. The stop position is determined from the rotation speed of the drive roller 50.

Further, a sheet cassette 51 for storing a color developer sheet 48 is removably disposed below the color image recording device 14, and in this embodiment, as shown in FIG. A peeling plate 52 is fixed to the inner surface of the cassette 51 on the paper feeding side. Further, the sheet cassette 5
A swinging arm 53 that is intermittently driven to swing by a drive device (not shown) is disposed above the swinging arm 53. At the tip of the swinging arm 53, a suction holding member 54 is attached to the swinging arm 53. It is rotatably attached to the

The color developer sheet 48 is attached to this suction holding member 54 once.
A suction cup 55 is attached to attract sheets one by one, and a roller 56 that rolls into contact with the upper surface of the uppermost color developer sheet 48 is rotatably attached to the attraction and holding member 54. Furthermore, the swing arm 53 and the suction holding member 5
A biasing spring 57 for biasing the suction holding member 54 clockwise in the figure is disposed between the suction and holding member 54.

Then, by swinging the swinging arm 53, the suction cup 55
By adsorbing the uppermost color developer sheet 48, this color developer sheet 48 is supplied to the paper feed roller 58, and the color developer sheet 48 supplied to the paper feed roller 58 is By exposure by the exposure device 34, the image on the mask original plate 15 is superimposed on the photosensitive recording medium 41 formed as a latent image, and the image is sent between the pressure rollers 44 of the pressure development device 45.

The color developer sheet 48 is, for example, disclosed in Japanese Patent Application Laid-Open No. 58-887.
It is constructed by coating a color developer disclosed in Japanese Patent No. 39 on a base paper, and is housed in the sheet cassette 51 with the color developer coated side facing downward.

Further, above the pressure developing device 45, a heat fixing device 5 is provided.
9 is disposed below the heat fixing device 59.
a pair of rollers 60, one of which is adjacent to the separation roller 49;
．． An endless belt 62 stretched around 61 is disposed. A rubber roller 6364.65 is in contact with the upper surface of this endless belt 62, and the developed color developer sheet 48 separated from the separation roller 49 by the endless belt 62 and each of the rubber rollers 63,64.65. It is designed to transport. Further, above the endless belt 62, a heater 67 and an impeller 68, which are housed in a casing 66 and heat the color developer sheet 48, are arranged.

Further, on the downstream side of the heat fixing device 59, a sheet discharge tray 69 is arranged to discharge the developer sheet 48 conveyed from the pressure developing device 45 to the heat fixing device 59.

Next, the operation of forming a color image from a set of mask originals 15R, 15G, and 15B using the image recording apparatus configured as described above will be described.

First, in order to harden the microcapsules containing a cyan dye precursor in the microcapsules coated on the photosensitive recording medium 41, a red mask original plate 15R is coated with toner as a light-shielding image on other parts. When creating a polygon scanner 3 based on a predetermined image signal.
is driven to form an electrostatic latent image on the surface of the photoreceptor 2, and a developer 4 causes toner to adhere to the electrostatic latent image to make it visible. On the other hand, the paper feed roller 7 is driven to transport the paper in the paper cassette 6 one by one between the photoreceptor 2 and the transfer device 5, and the transfer device transfers the toner image onto the paper. , the toner image is fixed by a fixing device 8, and this paper is transferred to A as a mask original 15R via a conveying roller 9, a paper path switching device 10, and a receiving roller 12.
It is transported to the DF tray 13.

Thereafter, by driving the feed roller 21, the mask original 15R is sent to the mask original transport path 20, and the mask original 15R is decurled by the recurler roller 22, and transferred to the transport roller 28, 30 and the gate 2.
4 to the alignment device 16. At this time,
The gate 24 is located at the position indicated by the solid line in the figure.

Next, by driving the feed roller 18, the mask original 15R is transported to a predetermined exposure position on the glass plate 17 of the alignment device 16, and the buffer roller 46 is moved in advance from the broken line position to the solid line position. By moving the photosensitive recording medium 41 in the E direction, the photosensitive recording medium 41 is pulled out to the lower surface side of the exposure table 38 by a predetermined length. At this time,
The upstream side of the photosensitive recording medium 4 is braked by a pressure roller 44, etc., and the portion of the photosensitive recording medium 41 where the color image has already been exposed is braked by a buffer roller 46 as the pressure developing device 45 operates. By moving in the direction of arrow F, it is sent to the pressure developing device 45.

Then, by driving the cam 39, the exposure table 3
8 to a predetermined position, and by pressing the fixed roller 40 on the left end thereof, the pulled out photosensitive recording medium 41 is fixed to the exposure table 38, and then the exposure table 38 is further lowered by the cam 39. , the photosensitive recording medium 41
Mask original plate 15R on the glass plate 17 of the alignment device
Closely contact.

In this state, by lighting the lamp 35 of the exposure device 34 and moving the exposure device 34 in the direction of the arrow along the glass plate 17, the let light from the red filter 37R passes through the mask original 15R to the photosensitive recording medium. 41, and scanning exposure is performed. After the exposure is completed, the lamp 35 is turned off and the exposure device 34 is moved back in the direction of arrow B.

At this time, the filter unit 37 is operated by a drive source (not shown) of the exposure device 34, and the green filter 37G is moved above the lamp 35.

Then, while the exposure device 34 moves backward, the exposure table 38 is raised by the rotation of the cam 39, and the photosensitive recording medium 41 is separated from the alignment device 16 and the mask original 15R.

At this time, in this embodiment, since pack tension is applied to the supply roll 43 of the photosensitive recording medium 41, the sagging of the photosensitive recording medium 41 that occurs when the photosensitive recording medium 41 is pulled out, and the exposure table The slack in the photosensitive recording medium 41 that occurs when the roller 38 is raised is taken up.

After the exposure of the red mask original 15R is completed, the exposure table 38 is raised only to a predetermined position, and the photosensitive recording medium 41 is moved by the fixed roller 4-0 pressed against the left end of the exposure table 38. It is held in a fixed state on the exposure table 38.

Next, in the same way as the above operation, a green mask original 15G is created by the monochrome laser printer 1, and this mask original 15G is transferred to the ADF tray 13, the feeding roller 21,
When the mask original 15R is conveyed through the recurler roller 22, through the mask original conveyance path 20, and just before the conveyance roller 28, the feed rollers 18, 19 and the conveyance rollers 31, 33 are driven, and the mask original 15R is retracted through the gate 27. Part 2
6 and transported out of the alignment device 16.

At this time, the gates 24 and 27 are at the positions indicated by solid lines in the figure,
The exposed mask master plate 15R has a gate 27 at its rear end.
It is held in a state where it is held between the conveyance rollers 33 at the position where it passes through.

At the same time, the conveyance rollers 28, 30 and the feed roller 1
According to 8.19, the mask original 15G is aligned with the alignment device 16.
is transported to a predetermined exposure position and stopped.

Then, as in the case of the mask original 15R, the mask original 15G is moved onto the photosensitive recording medium 4 by lowering the exposure table 38.
Exposure with green light is performed by moving the exposure device 34 while turning on the lamp 35 of the exposure device 34 while in close contact with the green light.

This mask original plate 15G is a mask in which the microcapsules containing a magenta dye precursor are cured in the microcapsules coated on the photosensitive recording medium 41, and toner as a light-shielding image is adhered to the other parts. Original version 15G
It is.

After the exposure is completed, the exposure table 38 is raised to a predetermined position, and the exposure device 34 is moved back to the original position, and the filter unit 37 is activated so that the blue filter 37B is positioned above the lamp 35. I'll keep it.

Next, when the blue mask original 15B created by the monochrome laser printer 1 is transported just before the transport roller 28, the transport rollers 18, 19 and 3
1 and 32 to transport the mask original 15G to the mask original discharge tray 25 through the gate 27,
The mask original 115B is transported to the exposure position and stopped.

At this time, the gate 24 is at the position shown by the solid line, and the gate 27 is at the position shown by the broken line, and the exposed mask original 15G is held between the transport rollers 32 with its rear end passing through the gate 27.

This mask original plate 15B is different from other mask original plates 15R and 15.
Similarly to G, the photosensitive recording medium 41 is brought into close contact with the photosensitive recording medium 41, and the photosensitive recording medium 41 is exposed to blue light through the mask original plate 15B.

This mask original plate 15B is a mask original plate in which toner, which is a light-shielding image, is attached to other parts of the microcapsules coated on the photosensitive recording medium 41 in order to harden the microcapsules containing a yellow dye precursor. 15B
It is.

Through the above operations, a latent image of a desired color image is recorded on the photosensitive recording medium 41.

Thereafter, the exposure table 38 is raised to the initial position by the cam 39, and the left end portion of the exposure table 38 is separated from the fixed roller 40 to release the fixation of the photosensitive recording medium 41.

At this time, as the preceding latent image formed on the photosensitive recording medium 41 is developed, the buffer roller 46 has been moved to the position shown by the broken line, and by moving this buffer roller 46 in the direction of arrow E, The unexposed portion of the photosensitive recording medium 41 is pulled out below the exposure stage 38 .

Then, by moving the buffer roller 46 in the direction of arrow F and rotating the drive roller 50, the exposed portion of the photosensitive recording medium 41 is transferred to the pressure developing device 45.
move it to

On the other hand, in synchronization with the movement of the photosensitive recording medium 41, by swinging the swinging arm 53 downward from the state shown in FIG. 2(a), as shown in FIG. 2(b), The rollers 56 are brought into contact with the upper surface of the color developer sheet 48, and by further swinging the swinging arm 53, the rollers 56 are
6 rolls on the upper surface of the color developer sheet 48, the suction holding member 54 is rotated counterclockwise against the biasing force of the biasing spring 57, and as shown in FIG. 2(c), the suction cup 55 is brought into contact with the uppermost color developer sheet 48. In this state, after sucking the color developer sheet 48 with the suction cup 55, by swinging the swinging arm 53 upward, as shown in FIG. The suction holding member 54 is rotated clockwise by the biasing force of the spring 57. At this time, the tip of the color developer sheet 48 and the suction cup 5
5 does not change, the rotation of the suction holding member 54 causes the leading end of the color developer sheet 48 to come into contact with the peeling plate 52 of the sheet cassette 51. When two color developer sheets 48 are adsorbed, the color developer sheets 48 other than the uppermost color developer sheet 48 can be reliably separated. Thereafter, as shown in FIG. 2(e), by further swinging the swing arm 53, the leading end of the color developer sheet 48 is supplied to the paper feed roller 58, and the color developer sheet 48 is fed to the paper feed roller 58. The agent sheet 48 is conveyed so that its leading edge corresponds to the leading edge of the latent image on the photosensitive recording medium 41.

Then, this color developer sheet 48 is applied to the drive roller 50.
The polymerized state is sent between the pressure rollers 44 and pressurized with the photosensitive recording medium 41, which is moved by the photosensitive recording medium 41. As a result, the uncured microcapsules on the photosensitive recording medium 41 are destroyed by pressure, and the microcapsules are exposed. A photosensitive recording medium 41 is placed on the colorant sheet 48.
A color image corresponding to the upper latent image is developed. At this time, when the pressure roller 44 of the pressure developing device 45 rotates in the direction of the arrow F, the buffer roller 46 is moved in the direction of the arrow F.

Note that during this development process, the photosensitive recording medium 41 is placed on the exposure table 3.
8 and a fixed roller 40, and the exposure device 3
4, the next color image is exposed.

The developer sheet 48 after development is peeled off from the photosensitive recording medium 41 by a separating roller 49 and conveyed to a heat fixing device 59, and the photosensitive recording medium 41 after peeling is wound up by a winding roller 47.

The color developer sheet 48 is attached to the endless belt 6.
2 and rubber rollers 63, 64, 65, and while being transported, the developer sheet 48 is heated by the heater 67 of the heat fixing device 59, and is heated by the impeller 68. The warm air circulating inside the casing 66 heats the casing 66 and promotes color development of the color image. At the same time, the binder polymer (binder resin) for fixing the color developing medium to the base paper of the color developer sheet 48 is thermally melted, and the surface becomes smooth, giving the surface of the color developer sheet 48 an appropriate level of gloss. It is formed.

Thereafter, the color developer sheet 48 that has been subjected to the color development and gloss treatment is discharged to the sheet discharge tray 69, and the desired image forming process is completed.

Furthermore, when outputting the same image, it is done as follows.

First, feed roller 1.8.19 and conveyance roller 28.
30 is driven to carry out the mask original 15B at the exposure position to the left, and the mask original 15R held in the mask original retraction part 26 is conveyed to the alignment device 16. At this time, the mask original 15B is held by the conveyance roller 28 at a position where its rear end passes through the gate 24.

Then, the mask original 15 transported to the alignment device 16
After alignment, R is brought into close contact with the photosensitive recording medium 41 by lowering the exposure table 38 and exposed to red light.

Next, the mask original 15R is transported to the mask original storage unit 23 and held by the transport rollers 29, and the mask original 15G held on the mask original discharge tray 25 is transported to the alignment device 16.

Similarly, this mask original 15G is brought into close contact with the photosensitive recording medium 41 and exposed to green light.

Next, the mask original 15G is conveyed to the mask original retraction part 26, and the mask original 15B held by the conveyance roller 28 is conveyed to the alignment device, and the photosensitive recording medium 4
1 and exposed to blue light.

By the above operation, a latent image of the same color image as that previously formed is formed on the photosensitive recording medium 41, and by pressing the photosensitive recording medium 41 and the color developer sheet 48 in a superimposed state, the same color image is formed on the photosensitive recording medium 41. Then, a color image is formed on the developer sheet 48.

Thereafter, by repeating the same operation, a predetermined number of color images can be formed from one set of mask originals 15R, 15G, and 15B.

After the necessary number of color images from the same mask original plate 15 are printed, the transport rollers 28, 2930, 31, 32.
33, the mask originals 15R, 15G, and 15B are discharged onto the mask original discharge tray 25.

In addition, if the next mask original 15 is output from the monochrome laser printer 1 while a series of color images are being exposed, it is stored once in the ADF hray 13, and after the exposure process is completed, the next mask master 15 is outputted from the monochrome laser printer 1. The sheets are fed into the color image recording device 14 one by one by a feeding roller 21.

In addition, when reusing a mask original 15 output from another monochrome laser printer 1 or a previously used mask original 15, by setting these mask originals 15 on the ADF tray 13, any mask original 15 can be used.
It is possible to carry out the supply of

Therefore, in this embodiment, the color developer sheet 48 is sucked by the suction cup 55 attached to the suction and holding member 54, and the developer sheet 48 is moved by the rotation of the suction and holding member 54.
Since the color developer sheet 48 is separated by bringing the tip of the color developer sheet 48 into contact with the peeling plate 52 of the sheet cassette 51, the color developer sheet 48 is reliably separated into one sheet without peeling off the color developer. As a result, appropriate pressure development can be performed, and image quality can be significantly improved. Moreover, unlike in the past, there is no need for an air jet mechanism for separating each color developer sheet 48 or a mechanism for lifting and lowering the plywood, so the structure is simple and can be manufactured easily, significantly reducing manufacturing costs. can be reduced.

〔Effect of the invention〕

As described above, the paper feeding mechanism of the image recording apparatus according to the present invention adsorbs the developer sheet with the suction cup attached to the suction holding member, and separates the developer sheet with the peeling plate of the sheet cassette. This makes it possible to reliably feed one sheet at a time without peeling off the developer on the developer sheet.As a result, appropriate pressure development can be performed, improving image quality. can be significantly improved. Moreover, unlike conventional methods, there is no need for an air jet mechanism to separate each color developer sheet or a mechanism for lifting and lowering the plywood, so the structure is simple and easy to manufacture, significantly reducing manufacturing costs. It has the advantage of being able to

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view showing an embodiment of an image recording apparatus to which a paper feeding mechanism according to the present invention is applied, and FIGS. 2(a), (b), and (c)
), (d), and (e) are longitudinal cross-sectional views showing the paper feeding operation by the paper feeding mechanism according to the present invention, respectively. 1... Monochrome laser printer, 13... ADF tray, 14... Color image recording device, 15... Mask original plate, 16... Positioning device, 34... Exposure device, 37... Filter, 38... Exposure table, 39... Cam, 41... Photosensitive recording medium, 45... Pressure developing device, 47... Winding roller, 48... Color developer sheet, 51... Sheet Cassette, 52... Peeling plate, 53... Swing arm, 54... Adsorption holding member, 55... Suction cup, 56... Roller, 57... Biasing spring, 58 - Paper feed roller, 59 ...Thermal fixing device, 62...Endless belt, 69...Sheet output tray.

Claims (1)

[Claims] An image recording device for supplying color developer sheets one by one, which are stacked and stored inside a sheet cassette and are superimposed on a photosensitive recording medium on which a latent image has been formed by a mask original, and then developed under pressure by a pressure development device. In the paper feeding mechanism, a swinging arm is disposed near the sheet cassette, and the tip of the swinging arm is moved up and down and rotated relative to the developer sheet by the swinging action of the swinging arm. An image recording apparatus characterized in that a suction and holding member is attached to the suction and holding member, a suction cup for adsorbing the color developer sheet is disposed on the suction and holding member, and a peeling plate is fixed to the inner surface of the sheet cassette on the sheet feeding side. Paper feeding mechanism.